一般来说 ,随机事件Ａ、Ｂ的某种关系 ,表达方式是不唯一的 .如Ａ与Ｂ的并 (和 )除可表示为Ａ∪Ｂ或Ａ +Ｂ外 ,还可表示为以下形式Ａ+ＡＢ ,Ｂ +ＡＢ ,ＡＢ +ＡＢ +ＡＢ ,Ω -ＡＢ ,ＡＢ ,Ａ +(Ｂ-Ａ) ,Ａ+(Ｂ-ＡＢ)等 .求解概率问题时 ,首先要确定随机事件如何表示 ,怎样求解 In general, the relationship between the random events A and B is not unique. For example, the sum (A) of A and B can be expressed as A∪B or A+B, and can also be expressed as the following form A. +AB ,B +AB ,AB +AB +AB ,Ω -AB ,AB ,A +(B-A) ,A+(B-AB) etc. When solving the probability problem, we must first determine how random events are represented and how Solution